Plasma radiation source for biochemical research

Piskarev, I.M.

Автор: Piskarev I.M.
Журнал: FEBS open bio
Том: 9
Номер: S1
Год издания: 2019
Издательство: John Wiley & Sons Inc.
Местоположение издательства: United States
Первая страница: 413
Последняя страница: 414
DOI: 10.1002/2211-5463.12675
Аннотация: Plasma radiation source for biochemical research. Plasma Activated Water (PAW) is applied in practice of biochemical research and in industry for sterilization of food. To obtain it, cold plasma generators are used. At a high specific power of plasma source the active species with a high probability are terminated in interactions between themselves. This leads to a decrease in the effectiveness of the method. We have created a spark discharge plasma radiation generator in air, which can be used to produce Radiation Activated Water (RAW). Water is treated by spark discharge plasma radiation; the discharge area is 3 cm from the RAW surface. Discharge power 0.4 J/s, pulse repetition rate 50 Hz. The features of reaction kinetics in water under the action of plasma radiation were investigated. The main mechanism is indirect effect of radiation. Active species first generated in water under plasma radiation, and then they interact with chemicals dissolved in water. That is, does not difference to treat water with dissolved chemicals directly by radiation, or to introduce the chemicals into the water after treatment with radiation. Unlike the RAW, in PAW the main processes occur at the time of plasma contact with water. The primary active species formed directly under the action of radiation are hydroperoxide radicals, hydrogen peroxide, nitrogen oxides. Secondary active species in RAW are hydrogen peroxide, nitrous acid and complex decaying into peroxynitrite and peroxynitrous acid during not less than 4 days. The reaction with active species in RAW lasts up to 4 days. Active species have both oxidizing and reducing properties, exibit a strong antimicrobial effect. There is a delay in the action of radiation, since a significant concentration of active species is achieved in water not less than 1 min after switching on the radiation source. RAW characteristics are: pH ~ 3, ORP = 790 mV (SHE), conductivity ~ 1 mS/cm. The specific energy cost of producing RAW is about 10 times less than PAW.
Добавил в систему: Пискарев Игорь Михайлович

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